Automatic section search method based on cut set search algorithm

Abstract

The invention discloses an automatic section search method based on a cut set search algorithm. The method is characterized in that the power transmission sections of a power grid are divided into initial sections, power transmission sections and key sections and includes: MATLAB reads basic data from PSASP and uses the read basic data to obtain the topological graph of the power grid, that is tosay, an adjacent matrix is obtained; the cut set search algorithm based on connectivity judgement is used to obtain the minimum cut set of the whole power grid, that is to say, the initial sections are obtained; screening the power transmission sections from the initial sections according to current directions and on-off distribution factor constraint conditions; calculating the safety margin of the power transmission sections, judging whether the safety margin of the power transmission sections is smaller than a threshold or not, and if so, the power transmission sections are selected as thekey sections; outputting all the key sections. By the method, missing of important sections can be avoided, and the time of operation staff can be saved.

Description

technical field [0001] The invention relates to a section search method, in particular to an automatic section search method based on a cut set search algorithm. Background technique [0002] Since most local power grid dispatching and planning departments use the software PSASP of China Electric Power Research Institute to calculate the power flow and short circuit of the local power grid to find out the weak links of the power grid, that is, to identify key sections, but the software PSASP does not have the function of automatically identifying sections. Therefore, most operation planners manually disconnect the line on the PSASP, calculate the power flow, and then repeat the above process a large number of times to obtain key sections. As the scale of the power grid becomes larger and larger, operators not only have an increasingly heavy workload, but also tend to miss key sections. Therefore, the automatic identification of cross-sections is very critical. [0003] At ...

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Problems solved by technology

[0003] At present, the methods for automatic identification of sections mainly include: 1) use the electrical tightness to partition the power grid, and then use the lines between the partitions as sections, but this method cannot search for sections inside the area; 2) identify sections based on the shortest path, Although this method can identify the sections inside the area, it does not consider the safety margin of the sections, and it is possible to find sections that are not actually monitored by the system

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